Driving mechanism for sewing-machine batteries



1,636,995 J y 1927' J. R. HANSON DRIVING MECHANISM FOR SEWING MACHINE BATTERIES Filed June2&926 4 Sheets-Sheet l I rwentor U. R/farrsam,

Attorney July 26, 1927. 1,636,995

J. R. HANSON.

DRIVING MECHANISM FOR SEWING MACHINE BATTERIES Filed June 29, 1926 4 Sheets-Sheet 2 n I I j 2%.

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a u Z5 4 5 Z Attorney July 26, 1927. 1,636,995

J. R. HANSON DhIVING MECHANISM FOR SEWING MACHINE BATTERIES Filed June 29 1926 4 SheetsSheet 5 Inventor Attorney Jdly 26, 1927. 1,636,995

Filed June 29. 1926 4 Sheets-'Sheet 4 Inventor Attamey Patented July 26, 1927.

UNITED STATES JOHN R. HANSON, OF ALEXANDRIA, MINNESOTA.

DRIVING MECHANISM FOR SEWING-MACHINE BATTERIES.

Application filed June 29,

This invention relates to a drive mechanism primarily, though not necessarily adapted for use in the driving of a battery of fur sewing machines, and has for its primary object to provide means whereby a single power unit may be employed in the operation of a plurality, preferably four in number, of fur sewing machines, the mechanism being so constructed as to permit any one of the machines to be operated without in any manner Whatever effecting the operation of the other machines.

A further object of the invention is to provide a drive mechanism of this character wherein the speed of any particular one of the fur sewing machines may be increased or diminished at the will of the operator or wherein any one or all of the machines may be quickly connected with the power unit or quickly disconnected therefrom.

Other objects will become apparent as the nature of the invention is better understood, the same comprising the novel form, combination, and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings wherein like numerals indicate like parts throughout .the several views:

Figure 1 is a side elevation of a sewing machine supporting table upon which is arranged, in the present instance, four fur sewing machines, together with a driving mechanism for the machines constructed in accordance with the present invention.

Figure 2 is a top plan view of Figure l, the table top upon which the machines are mounted being removed.

Figures 3 and 4 are detail vertical sections taken substantially upon the line 33 and 44 of Figure l and looking in the direc= tion of the arrows.

Figure 5 is a fragmentary top plan of the table top formed adjacent each of the fur sewing machines with a. longitudinal rack sided slot cooperating with a shaft drive gear actuating lever for maintaining said gear in predetermined relation with respect to a master drive gear whereby the speed of the respective fur sewing machine is main tained in a predetermined manner.

Figure 6 is an enlarged fragmentary view partly in cross section and partly in side elevation disclosing said master gear as well as the stationary supporting means therefor.

Figure 7 is a greatly enlarged fragmen- 1926. Serial No. 119,340.

tary horizontal section taken substantially upon the line 77 of Figure 2.

Figure 8 is a fragmentary enlarged detail partly in elevation and partly in section of one of the foot pedal controlled fur feed mechanism actuating bar as well as one of the foot pedal actuating bars of the various driving units for facilitating the displacement of the particular machine drive gears into or out of contact with the master drive gear.

Figure 9 is an enlarged detail vertical section taken substantially upon the line 99 of Figure 1 for more clearly disclosing one of the hanger units of the driving mecha nism.

Figure 10 is an enlarged longitudinal sec tion taken substantially upon the line 10-1O of Figure 9 also for more clearly disclosing the mounting means for the outer ends of the driven shafts of the various sewing machine drive units.

Figurev 11 is an enlarged fragmentary view partly in side elevation and partly in cross section disclosing the master drive gear as well as the gears upon the driven shafts of two of the driving mechanism units. and

Figure 12 is a perspective of one of the four eccentric levers that form important parts of the present invention.

Now having particular reference to the drawings, there is disclosed atable support including a top board 5, a smaller bottom board 6 and four vertical corner legs 7. Mounted upon the top board 5 of the table are four fur sewing machines designated A arranged in pairs at opposite sides of the center of the table, the machines of each pair being arranged in spaced back to back relation, as suggested by the dotted lines in Figure 2. Pivotally secured to the bottom board 6 of the table directly beneath each sewing machine is a foot lever 7 that is operatively connected to the fur feeding mechanism of the particular machine, which forms no part of the present invention, by reason of a vertically extending actuating bar 8 that passes through a suitable opening formed in the top board 5 in proper relation with respect to the sewing machine.

Depending from the center of the top board 5 is a pair of transversely spaced parallel arms 99, the upper and lower ends of which are offset inwardly and interconnected as clearly disclosed in Figure 4. Said arms are formed with transversely extending registering bores within which is securely mounted a transverse stationary shaft upon the center of which between said arms 99 is rotatably mounted a master sectional gear 11, the opposite sides of which are pro vided with lever or other friction material. The master gear 11 is formed with a circumferential channel 12 at its periphery over which is trained a belt 13 that extends horizontally toward one end of themachine supporting table and is in turn trained over a much smaller pulley wheel 14 upon one end -of the armature shaft of an electric motor 15 suspended from the under side of the tabletop, Figure 1.

Depending from the table top 5 outwardly of each pair of sewing machines is a shaft hanger '16 of general V-formation, the lower "bar of which is of considerable length in a horizontal plane as disclosed in Figure 9. Formed upon said lower bar of each hanger is a pair of spaced boxings 171'7 within which are longitudinally slidably mounted blocks 18-18 that are constructed for receiving the horizontal shafts 19-19, said pairs of'horizontal shafts being at opposite sides of the table center and the shafts of each pair being arranged at opposite sides of the master gear '11. The blocks of the shafts may be securely maintained within their respective boxings by reasons of set screws 20-2() threaded within openings at the opposit'e'ends of the-boxings. The inner end of'each of the shafts 19 is mounted for rotation within an eccentric horizontal bore 21 formed'through'a circnlarboss 22'upon the inner side-0f the upper end-of what-will hereinafter-be termed an eccentric lever23,

the upper end of the'lever being also formed with a-b'ore in registry with the bore in the boss-as clearly disclosed in Figure 12.

The circular bosses22 of the eccentrics'are arranged within sockets 24 formed in the 'opposite side surfaces of the master gear supporting arms-9 9 centrally of the stationary supporting shaft 10 of the master gear, Fig- *ure 7 "The ends of the shafts .19 arranged within the blocks 18 and eccentric bores 21 are -redueed and rounded as disclosed in both Figures 7 and 10 for reducing friction when the shafts are rotating therein, said-blocks being .formed :withcentral bores as disclosed iin Eigure 10. Splined-uponeach shaft 19 at 'the sides of the master gear 11 is a right angular friction gear 25 in frictional en- ;gagement-with. said master gear when its respective shaft 19 is in true horizontal alignrespective sewing machine to facilitate the movement of the gear 25 toward or away from the center of the master gear 11 for consequently increasing-or diminishing the speed of the shaft. For maintainng the lever 2. which is ofspring metal in predetermined adjusted position, one longitudinal edge of its respective slot 23 is racket as at 29 within which moves a tit 30 formed upon the adjacent side of said lever, Figure 5. ifior maintaining each lever in true vertical position, the same formed at its lower end with a relatively elongated cross bar 31 guided at its opposite ends within boresformed iii-the master gear supporting arms 9-9 and openings formea in cross bars of the1 hangers 16 as disclosed in Figures '1 ant 2.

Interconnecting the arms 23 of the eccen-,

tries and the outer sides of the master gear supporting arms 9.9 are retractile coil springs 32 for normally swinging the arms of the eccentric downwardly fortthus canting the inner ends of the shafts 19 so as to .ing lever 32, between one end of which and the respective eccentric is a rod 33 while intercom'iecting the opposite end ofsaid rocklever and-a pivoted foot pedal 34 upon. the bottom board of the-table is .a bar Obviously, by depressing any one or all of said foot pedals34 the eccentrics will be so act .itcd to move the inner ends of the shade 19 inwardly so asto bring the same. into horizontal vpositions and consequently maintain the gears 25 in frictional engagement with the master gear 11.

The foot pedal bars 8 and 35 are preferably of sectional formationas disclosedmore clearly in Figure 8, the ends ofvthe sections overlapping and being slidably interconnected by a collar 36 carrying-a binding set screw 37.

It will thus be seen that I have provided ashighly simple, novel, and efficient form of driving mechanism for sewing machinevbatteries that is well adapted for all the purposes heretofore designated, and even though l have herein shown and described this mechanism as consisting of certain detail structural elements it is nevertheless to be understood that some changes may be made therein without affecting the spirit and scope of the appended claim.

,Having thus describedthe invention, what I claim as new and desire to secure by Letters Patent is In a driving mechanism for sewing machine batteries. a supporting tableof elongated construction upon which machines are arranged on opposite sides of the center thereof, a pair of brackets supported by the table top and depending downwardly therefrom having their upper and lower ends secured together in abutting relation and their intermediate portions in spaced parallel relatiou. a master gear disposed between the spaced parallel portions. means for journaling the master gear between said spaced parallel portions so that its axis extends horizontally and transversely of the table, horizontal shafts, one for each machine, having their inner ends journaled in the brackets, other brackets depending from the table for supporting the outer ends of the shafts, gears on the inner ends of the shaft for engaging both faces of the master gear, driving connections between the shafts and their respective machines, said means for journaling the inner ends of said shafts being in the form of cams. means for rotating the cams to normally hold the gears on the shafts out of engagement With the master gear and manual control means for forcing said shaft gears into contact with the master ear.

a In testimony whereof I affiX my signature.

JOHN R. HANSON. 

